7.9: Earth and Space – The student knows components of our solar system. 7.9A: The student is expected to analyze the characteristics of the objects in.

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Presentation on theme: "7.9: Earth and Space – The student knows components of our solar system. 7.9A: The student is expected to analyze the characteristics of the objects in."— Presentation transcript:

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7.9: Earth and Space – The student knows components of our solar system. 7.9A: The student is expected to analyze the characteristics of the objects in our solar system that allow life to exist such as the proximity of the Sun, the presence of water, and composition of the atmosphere.

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Traditional understanding of the “habitable zone”

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How Earth Supports Life Proximity to Sun Atmospheric composition and layering Gravity Relationship with Moon Oceans What other conditions support life on Earth?

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Proximity to Sun Earth is the third closest planet to the Sun, approximately 150 million kilometers away. Earth is just close to and far enough away from the Sun (a star) to be warm.

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Earth’s Atmosphere (composition) 78% nitrogen 21% oxygen – almost all plant produced 1% other gases (argon, carbon dioxide, trace elements) The atmosphere has elements essential for building the chemical compounds to support life (carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur).